1、 NON-PRODUCTION MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2010 03 09 N-STATUS No replacement named L. Sinclair, NA 1988 10 01 Page 1 of 2 CLEANER SPRAY ALKALINE FOR ALUMINUM W-M5B321-A NOT TO BE USED FOR DESIGN 1. SCOPE: The material defined by this standard is a
2、nonfoaming, liquid alkaline cleaner. 2. APPLICATION: This material is used in spray washers for cleaning of aluminum condenser assemblies, associated ferrous brackets and receiver- driers. The cleaner is intended for removal of surface oils and contamination prior to chromate conversion coating and
3、subsequent paint application. It may be used for the treatment of other products of the same general description and/or materials. 3. REQUIREMENTS: 3.1 CHEMICAL COMPOSITION, WT.%: Total Alkali (as Na 2 O): 4.9-8.9 (FLTM AK 106-1) Total Phosphates (as P 2 O 5): 0.9-2.9 (FLTM AK 109-1) Total Silicates
4、 (as SiO 2): 1.4-3.4 (FLTM AK 112-1) Total Borates (as B 2 O 3): 0.5-2.5 (FLTM AK 111-1) Caustic Soda (as KOH): 1.1-3.1 (FLTM AK 107-1) Surfactants and/or Wetting Agents: 0.1% by wt. min (FLTM AK 116-1) Chromates: None detectable (FLTM AK 118-1) within limits of the test method Nitrites: None detect
5、able (FLTM AK 103-2) within limits of the test method 3.2 PH (1% SOLUTION): 11.0-12.0 (ASTM E 70) 3.3 SURFACE TENSION (1% SOLUTION) AT 77 F (25 C): 36.0 dynes/cm max (ASTM D 1331) 3.4 FOAMING: Cleaner shall be (FLTM BT101-1, 73 and 181 F, 2.5% by Vol) nonfoaming NON-PRODUCTION MATERIAL SPECIFICATION W-M5B321-A Page 2 of 2 4. STANDARD PARAGRAPHS: The following standard paragraphs as defined in Manufacturing Standard MBX are herewith made a part of this standard: A5, A7, C1, C2 (initial approval only), P1, P2, P3, R1, R2.
